改性热塑性聚氨酯弹性体的超临界发泡及其在鞋材上的应用  

Supercritical Foaming of Modified TPU and Its Application in Shoe Material

作　　者：信支援 邱丽雁 贾立疆 温时宝[1] 张振秀[1] XIN Zhiyuan;QIU Liyan;JIA Lijiang;WEN Shibao;ZHANG Zhenxiu(College of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学高分子科学与工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2020年第4期88-93,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51273098).

摘　　要：分别采用POE(聚烯烃弹性体)、EVA(乙烯-醋酸乙烯共聚物)、EMA(乙烯丙烯酸甲酯共聚物)和OBC Infuse(烯烃嵌段共聚物)4种材料对TPU(热塑性聚氨酯弹性体)进行共混改性,使用超临界发泡的方法制备了超轻且高弹的改性TPU发泡颗粒。预期发泡密度在0.15g·cm^-3左右,此时TPU/POE、TPU/EVA、TPU/EMA和TPU/OBC Infuse对应的最佳发泡温度分别为130、134、135和132℃。将改性TPU发泡颗粒蒸汽成型制成板材,通过扫描电镜(SEM)观察板材的泡孔结构、尺寸和熔接面,并测试其力学性能。结果表明:相比纯TPU发泡材料,改性TPU柔软性更好,回弹性更高,其中,TPU/OBC Infuse改性板材弹性最好、压缩永久变形最小、熔接强度高。TPU(thermoplastic polyurethane elastomer)were blended with POE(polyolefin elastomer),EVA(ethylene-vinyl acetate copolymer),EMA(ethylene-methyl acrylate copolymer)and OBC Infuse(olefin block copolymer),respectively.The foamed particles of ultralight and high resilience modified TPU were made by Supercritical foamed method.The optimal foamed temperatures of TPU/POE,TPU/EVA,TPU/EMA and TPU/OBC Infuse respectively were 130,134,135and 132℃when the expected foamed density was around 0.15g·cm^-3.The modified TPU foamed particles were formed into sheet by steam molding.The structure,size and welding surface of the foam sheet were observed by SEM;and their mechanical properties were tested.The results showed that,the modified TPU had better softness and higher resilience compared to the pure TPU foamed materials,among which,the TPU/OBC Infuse modified sheet had the best resilience,minimum compression permanent deformation and high welding strength.

关 键 词：热塑性聚氨酯弹性体 共混改性 超临界 发泡 鞋材 

分 类 号：TQ334[化学工程—橡胶工业]